sw: Make i2c-ocores driver compatible with Linux Kernel Version > 4.7.0

This is done by aligning definations of i2c_add_mux_adapters and i2c_del_mux_adapters with updated i2c-mux.h in later kernel version.

Signed-off-by: Mamta Shukla mamta.ramendra.shukla@cern.ch

software/spi-ocores/drivers/spi/spi-ocores.c

@@ -596,7 +596,7 @@ static int spi_ocores_process(struct spi_ocores *sp)
 			spi_ocores_finalize_current_message(sp);
 	}
 
-	return 0;
+	return err;
 }
 
 /**